用电容测量仪可以精确测出电容值,但测不出其放电速率。如果想用肉眼“看”一下放电过程是怎样进行的,例如在教学过程中领会时间常数的概念,很需要一个能用图形演示电容放电过程的电路。本电路可以让你看到一低压电容放电的全 With capacitance measuring instrument can accurately measure the capacitance value, but can not measure its discharge rate. If you want to use the naked eye to “see” the discharge process is how, for example, in the teaching process to understand the concept of time constant, it is necessary to be able to use a graphical demonstration of capacitive discharge process of the circuit. This circuit allows you to see a full discharge of low-voltage capacitors